Common Administration Task - Revision history

130.156.1.84: /* Managing Groups */

2019-02-27T01:37:15Z

Managing Groups

← Older revision		Revision as of 01:37, 27 February 2019
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	To see a list of groups you are a memeber of		To see a list of groups you are a memeber of
	groups		groups
			newgrp # temp switch groups

	=[[Centos OS]]=		=[[Centos OS]]=

130.156.1.84: /* Managing User Accounts */

2019-02-27T01:14:21Z

Managing User Accounts

← Older revision		Revision as of 01:14, 27 February 2019
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	==Managing User Accounts ==		==Managing User Accounts ==
			'''Get info on a user'''
			finger sysadmin

	Create user accounts		Create user accounts
	useradd name		useradd name
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	Alternatively, you can use the passwd –l username command to lock a user account, and the passwd –u username command to unlock a user account.		Alternatively, you can use the passwd –l username command to lock a user account, and the passwd –u username command to unlock a user account.
	[[File:Usermodoptions.png\|thumb\|usermod options]]		[[File:Usermodoptions.png\|thumb\|usermod options]]

	==Deleting user Accounts==		==Deleting user Accounts==
	To delete a user account, you can use the userdel command and specify the user name as an argument. This removes entries from the /etc/passwd and /etc/shadow files corresponding to the user account. Furthermore, you can specify the –r option to the userdel command to remove the home directory for the user and all of its contents.		To delete a user account, you can use the userdel command and specify the user name as an argument. This removes entries from the /etc/passwd and /etc/shadow files corresponding to the user account. Furthermore, you can specify the –r option to the userdel command to remove the home directory for the user and all of its contents.

130.156.1.84: /* Log File Administration */

2019-02-27T00:43:26Z

Log File Administration

← Older revision		Revision as of 00:43, 27 February 2019
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	[[File:Logmanagement.png\|thumb]]		[[File:Logmanagement.png\|thumb]]
	Working with the System Log Daemon The System Log Daemon (rsyslogd) is the traditional and most common logging daemon used on Linux systems. When this daemon is loaded upon system startup, it creates a socket (/dev/log) for other system processes to write to. It then reads any information written to this socket and saves the information in the appropriate log file according to entries in the /etc/rsyslog.conf file and any files within the /etc/rsyslog.d directory.		Working with the System Log Daemon The System Log Daemon (rsyslogd) is the traditional and most common logging daemon used on Linux systems. When this daemon is loaded upon system startup, it creates a socket (/dev/log) for other system processes to write to. It then reads any information written to this socket and saves the information in the appropriate log file according to entries in the /etc/rsyslog.conf file and any files within the /etc/rsyslog.d directory.
			journalctl

	==Managing User Accounts ==		==Managing User Accounts ==
	Create user accounts		Create user accounts

130.156.1.84: /* Managing Printers= */

2019-02-26T23:38:52Z

Managing Printers=

← Older revision		Revision as of 23:38, 26 February 2019
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	== Managing Printers===		== Managing Printers==
	'''print queue folder'''		'''print queue folder'''
	/var/spool/cups		/var/spool/cups
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	/etc/cups/cupsd.conf		/etc/cups/cupsd.conf
	'''You can access the CUPS Web administration tool using a Web browser on TCP port 631 by navigating to http://servername:631,'''		'''You can access the CUPS Web administration tool using a Web browser on TCP port 631 by navigating to http://servername:631,'''

	==Log File Administration==		==Log File Administration==
	'''Log files are stored in the '''		'''Log files are stored in the '''

Bacchas: /* Managing Groups */

2019-02-18T17:02:56Z

Managing Groups

← Older revision		Revision as of 17:02, 18 February 2019
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	userdel john		userdel john
	==Managing Groups==		==Managing Groups==
			By far, the easiest way to add groups to a system is to edit the /etc/group file using a text edi- tor. Another method is to use the groupadd command. To add a group called group1 to the system and assign it a GID of 492, you can use the following command
			groupadd -g 492 group1

			Then, you can use the -G option to the usermod command to add members to the group. To add the user maryj to this group and view the addition, you can use the following usermod command:
			usermod –G group1 mary
			To see a list of groups you are a memeber of
			groups

	=[[Centos OS]]=		=[[Centos OS]]=

Bacchas: /* Managing Groups */

2019-02-18T15:21:03Z

Managing Groups

← Older revision		Revision as of 15:21, 18 February 2019
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	==Managing Groups==		==Managing Groups==

	[[Centos OS]]		=[[Centos OS]]=

Bacchas: /* Creating User Accounts */

2019-02-17T20:41:13Z

Creating User Accounts

← Older revision		Revision as of 20:41, 17 February 2019
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	[[File:Logmanagement.png\|thumb]]		[[File:Logmanagement.png\|thumb]]
	Working with the System Log Daemon The System Log Daemon (rsyslogd) is the traditional and most common logging daemon used on Linux systems. When this daemon is loaded upon system startup, it creates a socket (/dev/log) for other system processes to write to. It then reads any information written to this socket and saves the information in the appropriate log file according to entries in the /etc/rsyslog.conf file and any files within the /etc/rsyslog.d directory.		Working with the System Log Daemon The System Log Daemon (rsyslogd) is the traditional and most common logging daemon used on Linux systems. When this daemon is loaded upon system startup, it creates a socket (/dev/log) for other system processes to write to. It then reads any information written to this socket and saves the information in the appropriate log file according to entries in the /etc/rsyslog.conf file and any files within the /etc/rsyslog.d directory.
	==~~Creating~~ User Accounts ==		==Managing User Accounts ==
	Create user accounts		Create user accounts
	useradd name		useradd name
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	Alternatively, you can use the passwd –l username command to lock a user account, and the passwd –u username command to unlock a user account.		Alternatively, you can use the passwd –l username command to lock a user account, and the passwd –u username command to unlock a user account.
	[[File:Usermodoptions.png\|thumb\|usermod options]]		[[File:Usermodoptions.png\|thumb\|usermod options]]
			==Deleting user Accounts==
			To delete a user account, you can use the userdel command and specify the user name as an argument. This removes entries from the /etc/passwd and /etc/shadow files corresponding to the user account. Furthermore, you can specify the –r option to the userdel command to remove the home directory for the user and all of its contents.
			When a user account is deleted, any files that were previously owned by the user become owned by a number that represents the UID of the deleted user. Any future user account that is given the same UID then becomes the owner of those files.
			userdel john
			==Managing Groups==

	[[Centos OS]]		[[Centos OS]]

Bacchas: /* Creating User Accounts */

2019-02-17T20:29:24Z

Creating User Accounts

← Older revision		Revision as of 20:29, 17 February 2019
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	passwd name		passwd name
	[[File:Useradd.png\|thumb\|user add options]]		[[File:Useradd.png\|thumb\|user add options]]

			'''change the login name of the user '''
			usermod -l john johnb

			Sometimes it’s necessary to lock an account—that is, to temporarily prevent a user from logging in. To lock an account, you can use the command usermod –L username at the command 10 prompt. This places a ! character at the beginning of the encrypted password field in the /etc/shadow file. To unlock the account, simply type usermod –U username at the command prompt, which removes the ! character from the password field in the /etc/shadow file.
			Alternatively, you can use the passwd –l username command to lock a user account, and the passwd –u username command to unlock a user account.
			[[File:Usermodoptions.png\|thumb\|usermod options]]
	[[Centos OS]]		[[Centos OS]]

Bacchas: /* Creating User Accounts */

2019-02-17T20:24:37Z

Creating User Accounts

← Older revision		Revision as of 20:24, 17 February 2019
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	/etc/login.defs		/etc/login.defs
	The second file, /etc/default/useradd, contains information regarding the default primary group, the location of home directories, the default number of days to disable accounts with expired passwords, the date to disable user accounts, the shell used, and the skeleton direc- tory used. The skeleton directory, which is /etc/skel on most Linux systems, contains files that are copied to all new users’ home directories when the home directory is created. Most of these files are environment files, such as .bash_profile and .bashrc.		The second file, /etc/default/useradd, contains information regarding the default primary group, the location of home directories, the default number of days to disable accounts with expired passwords, the date to disable user accounts, the shell used, and the skeleton direc- tory used. The skeleton directory, which is /etc/skel on most Linux systems, contains files that are copied to all new users’ home directories when the home directory is created. Most of these files are environment files, such as .bash_profile and .bashrc.
			<br>
			To set the password, simply type the passwd command, type the name of the new user account at a command prompt, and then supply the appropriate password when prompted. An example of setting the password for the bobg user is shown in the following:
			passwd name
			[[File:Useradd.png\|thumb\|user add options]]
	[[Centos OS]]		[[Centos OS]]

Bacchas: /* Creating User Accounts */

2019-02-17T20:20:57Z

Creating User Accounts

← Older revision		Revision as of 20:20, 17 February 2019
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	Working with the System Log Daemon The System Log Daemon (rsyslogd) is the traditional and most common logging daemon used on Linux systems. When this daemon is loaded upon system startup, it creates a socket (/dev/log) for other system processes to write to. It then reads any information written to this socket and saves the information in the appropriate log file according to entries in the /etc/rsyslog.conf file and any files within the /etc/rsyslog.d directory.		Working with the System Log Daemon The System Log Daemon (rsyslogd) is the traditional and most common logging daemon used on Linux systems. When this daemon is loaded upon system startup, it creates a socket (/dev/log) for other system processes to write to. It then reads any information written to this socket and saves the information in the appropriate log file according to entries in the /etc/rsyslog.conf file and any files within the /etc/rsyslog.d directory.
	==Creating User Accounts ==		==Creating User Accounts ==
			Create user accounts
			useradd name
			This file contains parameters that set the default location for e-mail, pass- word expiration information, minimum password length, and the range of UIDs and GIDs available for use. In addition, it determines whether home directories will be automatically made during user creation, as well as the password hash algorithm used to store passwords within /etc/shadow.
			/etc/login.defs
			The second file, /etc/default/useradd, contains information regarding the default primary group, the location of home directories, the default number of days to disable accounts with expired passwords, the date to disable user accounts, the shell used, and the skeleton direc- tory used. The skeleton directory, which is /etc/skel on most Linux systems, contains files that are copied to all new users’ home directories when the home directory is created. Most of these files are environment files, such as .bash_profile and .bashrc.
	[[Centos OS]]		[[Centos OS]]